.myarrow {
  position: relative;
  padding: 12px 0;
}

.myarrow:before {
  content: "";
  height: 0;
  width: 0;
  border-width: 0 8px 12px 8px;
  border-style: solid;
  border-color: transparent transparent #eeeeee transparent;
  position: absolute;
  top: 0px;
  left: 50%;
  transform: translateX(-50%);
}

.page {
  background: #eeeeee;
  width: 340px;
  height: 500px;
  margin: 0 auto;
}

.darwin.page {
  border-radius: 5px;
  overflow: hidden;
}
